Protected by a great wall, the Holy Kingdom of Roble has enjoyed years of peace. But with the sudden appearance of the demon king Jaldabaoth and his army of evil demi-humans, peace and tranquillity are shattered. Remedios, the Grand Master of the Paladins, and the High Priestess Kelart gather their forces to fight back together. But alone they are no match for the overpowering Yaldabaoth. When the Holy Kingdom is on the verge of collapse, Remedios sets off with her order and her follower Neia in search of help. They finally find it in the witcher kingdom of Ainz Ooal Gown, a strange nation ruled by the undead, who are actually loathed by the people of the Holy Kingdom. Can they win the battle against the Demon King together?